//: generics/coffee/CoffeeGenerator.java
// Generate different types of Coffee:
package generics.coffee;
import java.nio.channels.UnsupportedAddressTypeException;
import java.util.Iterator;
import java.util.Random;

import net.mindview.util.Generator;

public class CoffeeGenerator
implements Generator<Coffee>, Iterable<Coffee> {
  private Class[] types = { Latte.class, Mocha.class,
    Cappuccino.class, Americano.class, Breve.class, };
  private static Random rand = new Random(47);
  public CoffeeGenerator() {}
  // For iteration:
  private int size = 0;
  public CoffeeGenerator(int sz) { size = sz; }	
  public Coffee next() {
	  try {
		return (Coffee)types[rand.nextInt(types.length)].newInstance();
	} catch (Exception e) {
		throw new RuntimeException(e);
	}
  }
  class CofferIterator implements Iterator<Coffee>{
	int count = size; 
	public boolean hasNext() {
		return count > 0;
	}
	public Coffee next() {
		count--;
		return CoffeeGenerator.this.next();
	}
	public void remove() {
		throw new UnsupportedOperationException();
	}
  }
  public Iterator<Coffee> iterator() {
	  return new CofferIterator();
  }
  public static void main(String[] args) {
    CoffeeGenerator gen = new CoffeeGenerator();
    for(int i = 0; i < 5; i++)
      System.out.println(gen.next());
    for(Coffee c : new CoffeeGenerator(5))
      System.out.println(c);
  }
} /* Output:
Americano 0
Latte 1
Americano 2
Mocha 3
Mocha 4
Breve 5
Americano 6
Latte 7
Cappuccino 8
Cappuccino 9
*///:~
